Scott Taylor <scott(dot)taylor(at)4i-dotcom(dot)com> writes:
> Could anyone tell me what (if anything) I can do if I upgraded from 7.1.3 to
> 7.2, without doing backup (pg_dump). I cannot read my dataset because it is
> incompatible with new version. Could you give me the commands?
You're going to have to reinstall 7.1.3 and run pg_dumpall.
regards, tom lane